package org.smart4j.framework.util;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileFilter;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;

public class ClassUtil {
    private static final Logger LOGGER = LoggerFactory.getLogger(ClassUtil.class);

    public static ClassLoader getClassLoader()
    {
        return  Thread.currentThread().getContextClassLoader();
    }

    public static Class<?> loadClass(String className,boolean isInitialized)
    {
        Class<?> cls;
        try {
            cls=Class.forName(className,isInitialized,getClassLoader());
        }
        catch (ClassNotFoundException e)
        {
            LOGGER.error("load class failure",e);
            throw new RuntimeException(e);
        }
        return cls;
    }

    public static Class<?> loadClass(String className)
    {
        return  loadClass(className,true);
    }

    public static Set<Class<?>> getClassSet(String packageName)
    {
        Set<Class<?>> classSet=new HashSet<Class<?>>();
        try {
            Enumeration<URL> urls=getClassLoader().getResources(packageName.replace(".","/"));
            while (urls.hasMoreElements())
            {
                URL url=urls.nextElement();
                if(url!=null)
                {
                    String protocol=url.getProtocol();
                    if(protocol.equals("file"))
                    {
                        String packagePath=url.getPath().replace("%20", " ");

                    }
                    else if(protocol.equals("jar"))
                    {

                    }
                }
            }
        }
        catch (Exception e)
        {

        }
    }

    private static void addClass(Set<Class<?>> classSet,String packagePath,String packageName)
    {
        File[]  files=new File(packagePath).listFiles(new FileFilter() {
            public boolean accept(File file) {
                return (file.isFile()&&file.getName().endsWith(".class")||file.isDirectory());
            }
        });
        for(File file:files)
        {
            String fileName=file.getName();
            if(file.isFile())
            {
                String className=fileName.substring(0, fileName.lastIndexOf("."));
                if(StringUtils.isNotEmpty(packageName))
                {
                    className=packageName+"."+className;
                }

            }
        }


    }

    private static void doAddClass(Set<Class<?>> classSet,String className)
    {
        Class<?>cls=loadClass(className,false);
        classSet.add(cls);
    }

}
